Malfunction in the IF 8000 can result in the device ceasing to operate 7.2.14

IF 8000; 1/F Interferential Electrical Stimulation Device; NMES (neuromuscular electrical stimulation) mode. Designed for use in physical therapy, rehabilitation, and pain relief applications.  Zynex notified customers that a malfunction in the IF 8000 can result in the device ceasing to operate, and in some instances,overheating and becoming hot to the touch .Z-1874-2014